Motion transmitting mechanism



Get. 17, 1944. O M ET AL 2,360,497

' MOTION TRANSMITTING MECHANISM Original Filed July 8, 1941 2 Sheets-Sheet l 2/2 INVENTORS J'oH/v 0; Hunss 0 CALMER E. Goaoow DELA SE0 5 Y NELL/E M. GORDON 1 W100 AND LEGAL 70 a. 2 REPRESENTATIVE 1944- J. Q. HOLMES ET AL 0,49

MOTION I TRANSMITTING MECHANISM Origifial Filed July 8; 1941 2 Sheets-Sheet 2 INVE N TORS J'onlv Q, HOLMEJ AND CALMER E. GORDON one-n50 er A/i'LL/E MGonbou wmon/ AND LEGAL 4 B x REPR ass/v rA T/ y:

( ATFOFQN EYS Patented Oct. 17, 1944 MOTION TRANSMITTINGMECHANISM John Q.'Holmes, Linden, N. J.,"and Caliper E.

Gordon, deceased, late ofMarkleville, 1nd,; "by

=N'elli'e M. Gordon, widowahd legal representasaid Holrnes and said Calmer E. Gordon assignor'sto General Motors Corporation, Detroit, Micln, acorporation of tive, Emporia, Ind.

Delaware 'Ori'gi'naI application July 8, 1941, Serial No. 4015445 Divided and this application March 11, 1943, Serial No. 478,770

This invention relates to hydraulic presses having rotaryplate conveyors carrying a plurality of work holders which are automatically moved into position to'beoperat'ed upon by the ram of the press. This application is a division of 'Ser. No. 401,544, filed July 8; 1941. In that application, the object of the invention is to provide a self-contained hydraulic press unit of the enclosed type which can be adapted for various kinds of work and operations by the selection of suitable subassemblies of a number of interchangeable subassemblies. This object is accomplished by providing a table supported by a base which encloses a reservoir for ontaining a pressure fluid and a motor drive pressure pump unit mounted over the reservoir. The table supports a pedestal on one side of which is mounted a ram unit providing one or'more rams operated by pistons operating in hydraulic cylinders. The table supports a rotary plate conveyor or dial feed which may be one selected from a number of interchangeable dial feed units. The pedestal, Which pports theram unit, provides an enclosure for a dial feed operating mechanism and for a cam operated valve for controlling the admission and the discharge of pressure fluid with respect to-the ram cylinder in timed relation with respect to movements of the dial feed. The dial feed operating mechanism and the valve-controlling cam are operated by an electric motor contained within the housing provided by the pedestal.

Theclaimed subject matter of the present application is the dial feed unit comprising a turn table and its operating mechanism provided with a facile means for adjusting the timed relation between the dial'feed operating mechanism and the valve controlling cam.

Further objects'ahd advantages of the present invention will be"apparent from the following description, reference being had to the accompanying' drawings wherein a preferred embodiment of the present invention is clearly shown.

In. the drawings:

'Fig. 1 is a side elevation of an hydraulic press embodying the present invention.

Fig. 2 is a sectional view on line 2--2 of Fig. 3 and is drawn to a larger scale.

Fig. 3is a composite view in the direction of arrow 3 of Fig. 1 and comprises segments AB, BC and CA. Segment AB is a plan view of the dial feed; BC is a sectional view on line BCof Fig. 4:"and the segment CA is a sectional view on the line CA of 'Fig. 1.

Fig. 4 is a sectional view on line -44 of Fig. 3.

The machine comprises a base 29 providing a tank'forrontaining a hydraulicpress'ure fluid. The base -2ll'supports a cover plate 25 providing a base forsupporti-ng' certain elements of an hydraulic pressure system, incl'udi'ngan electric motor driven fluid pressure pump whose connections with pipes I44 and 'I4ll-l'eadingf respectively to the upper and-lo'werends of cylinder I25 are controlled by a valve operated by a shaft II'4a which is driven by the electric motor through a speed reducing gear.

The plate 25 supports a-box-like framefor enclosing the electric motor, pressure'pump and control valve. Ventilation is providedfor by one or morescre'en'ed openings 63. The frame 69 supports a platform or table 10d which supports a casting "II having a mounting pad I2I to which is secured a framel'2'2 providing a guide for a ram I-23 and a support for an hydraulic cylinderIZS enclosing apiston (not shown) connectedby part I28 with the ram I23. The mounting pad -I2l is so shaped as to accommodate any one of a series of castings such as the casting I22. The ram I23 operates a tool unit IZta which causes an intermediate tool unit 260 to operateupon work carried by one of a plurality of work holders'l25a mounted upon a dial feed turn table Hila.

The turn ta'ble IBM is part of a turn table unit which may be one of several units adapted to be mounted interchangeably on the platform'llla. The unit includes a housing IBIla having a boss I53a holding a rod 'I'64a which supports a tray IiiBa. Rod I64a provides a journal for supporting a bearing sleeve 165a fitted into turn table IGIa which is supported vertically by a ball bearing IBM. The turn table I6Ia is caused to be intermittently rotated by a mechanism driven by the shaft NM.

The mechanism for intermittently rotating the table I6Ia will now be described with reference to Figs. 2, 3 and 4. Housing IBM provides bearings at I84, I for shaft U la-which drives a gear I86 meshing with a gear I81 keyed to a shaft i88 (Fig. 3). Shaft-I88 is journalled in bearings I89 and I-SI] provided by the housing 160a. The right hand portion of the shaft- I88 is tubular and is externally threaded at I9I to receive a nut I92 which when tightened causes the -fo1'lowing parts to be gripped between the nut I92 and a shoulder I88a of sha-ft- 188-, namely: the hub of gear I81, a spacing-sleeve I93 and -the-inner race I94 of ball bearing I90. Theshaft I88 supports and drives a camunit -I95having a longitudinal spline connection with'shaft lilll-asindicated at I96. The cam unit --I95- canbe adjusted longitudinally along the shaft and locked in the desired position of adjustment. For this purpose the central bore I88b of shaft I88 receives a rod 208 connected with the cam unit I95 by a cross pin 28I extending through longitudinal slots 282 provided by the shaft I88. Rod 208 is provided with a portion 283 of reduced diameter threaded to receive a nut 284. When the nut is tightened the following parts are clamped between the nut and a shoulder 285 of the rod 288, namely: an externally threaded sleeve 286 having a hex head 28? and a washer 288. When the nut 284 is slightly loosened, the threaded sleeve 286 may be turned. Since this sleeve is threadedly connected at 289 with the shaft I88, rotation of the sleeve 286 by applying a wrench to its head 281 will cause the rod 283 to move axially and relative to the shaft I88. This will cause the cam unit I95 to be moved longitudinally with respect to shaft I88. When the cam I95 has been located in the desired position of adjustment a nut 2I8 threaded on the sleeve 206 can be tightened down against the right end of shaft I88 and the nut 284 can be tightened against the washer 288 and the latter against the hex head against sleeve 286. In this way, the rod 283 is secured in the desired position of adjustment with respect to the shaft I88. The adjusting parts including the nut I92, the nut 2I8, the hex head 281 and the nut 284 are enclosed by a cup shaped housing 2I| secured to the housing I60a by a plurality of screws 2I2.

The cam unit I95 is provided with a cam groove 228 for receiving cam follower rollers 22I. Each roller 22I is mounted on a pin 222 attached to turntable IGIa. The cam groove 228 i so shaped that the table I8Ia is moving during about one-half revolution of shaft H411 and shaft I88 and is stationary for about onehalf revolution. The cam I95 is so related to the hydraulic-valve controlling cam that While the table I6Ia is stationary, the ram I23 moves downwardly to'cause an operation to be performed on the work piece and then the ram returns to upward position. As the cam I95 is viewed in Fig. 3, it will be seen that one of the rollers 22Ia is entering the groove 220 while an adjacent roller 22Ib is moving from the groove, rotation of cam I95 being in the direction indicated by arrow I95a. By the time the roller 22Ia has arrived at the non-camming part of the groove indicated at 228a, the table IBIa will have been moved into such position that a workholder I24a will have been brought into alignment with the tools controlled by the ram of the press or at least into such position that one of the pilot bushings I'I3a (Figs. 1, 3 and 4) is in alignment with the pilot rod I'I4a attached to the upper member of the tool unit. In order to make this aligmnent as perfect as possible the cam I95 is adjustable along the shaft I88 by the means which has been described with reference to Fig. 2.

The shaft I64a which provides a journal for the table I6Ia, also supports a tray I68a for containing articles which are to be assembled by the machine.

While the embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. In a device of the character described, the combination of a rotary element, a plurality of members connected with the element and equally spaced in a circular row, a cam for successively engaging said members, a shaft for driving the cam and having a central bore, and diametrically opposite longitudinal slots, a cross pin connected with the cam and extending across the bore and through the slots of the shaft, a rod Within the bore attached to the cross pin, a sleeve surrounding the rod and threadedly connected with an end of the shaft, means limiting endwise movement of the rod relative to the sleeve whereby rotation of the sleeve causes the rod and the cam to move longitudinally of the shaft, and means for securing the sleeve against rotation from the desired position of adjustment.

2. In a device of the character described, the combination of a driven element, a rotary cam for driving said element, a shaft for driving the cam and having a central bore, and diametrically opposite longitudinal slots, a cross pin connected With the cam and extending across the bore and through the slots of the shaft, 2. rod within the bore attached to the cross pin; and means for securing the rod to the shaft in a desired position of longitudinal adjustment.

3. In a device of the character described, the combination of a driven element, a rotary cam for driving said element, a shaft for driving the cam and having a central bore and diametrically opposite longitudinal slots, a cross pin connected with the cam and extending across the bore and through the slots of the shaft, a rod within the bore attached to the cros pin; means for adjusting the rod longitudinally of the shaft, and means for securing the adjusting means to the shaft.

4. In a device of the character described, the combination of a rotary element, a plurality of members connected with the element and equally spaced in a circular row; a cam for successively engaging said members, a shaft for driving the cam and having a central bore and longitudinal slots, pin means connected with the cam and extending into the slots and a rod within the bore attached to the pin means; means for adjusting the rod longitudinally of the shaft, and means for securing the adjusting means to the shaft.

5. In a device of the character described, the combination of a rotary element, a plurality of members connected with the element and equally spaced in a circular row; a cam for successively engaging the members, said cam being formed so that the rotary element is turned a certain angular distance in one direction during a portion of one revolution of the cam and held stationary during the remaining portion of said revolution of the cam; a shaft for driving the cam and having a longitudinal bore and longitudinal slots; means connected with the cam and extending across the bore and through the slots of the shaft; a rod within the bore attached to the connecting means; and means for securing the rod to the shaft in a desired position of longitudinal adjustment so that the cam will locate the rotary element in a definite position during the time the rotary element is stationary, and means for securing the adjusting means to the shaft.

JOHN Q. HOLMES. NELLIE M. GORDON, Widow and Legal Representative of C'almer E.

Gordon, Deceased. 

